Thread: Depressurising rear Airbags.

Are you removing the airbags and fitting coils?

If so, the last one I did I jacked up the chassis then just cut the airlines next to the airbags.

I'm keeping the airbags so don't want to damage them. i neeed to remove them to put in a 2" spacer under the bag.

Originally Posted by PhillWilde

G'day folks,
Got my new suspension today for the Disco and would like to fit it this weekend, just need to know what the best way is to de-pressurize my rear sls suspension before i remove the airbags.
Rave says to use testbook, anybody have some wisdom to share?

Cheers, Phill

Anyone?

While I'm not up on the Disco2, can you not lower the rear end down which will release most of the air.

Then you can release the bottom mounts of the springs (maybe dampers too), lift the body & fit your spacers.

Originally Posted by Scouse

While I'm not up on the Disco2, can you not lower the rear end down which will release most of the air.

Then you can release the bottom mounts of the springs (maybe dampers too), lift the body & fit your spacers.

G'day Scouse,

You can lower the rear end uf you have the optional sls remote control, it's used for when hitching up trailers/caravans etc. I don't have one.

I was thinking i could disconnect the height sensors and trick the BCU into thinking it needs to release air to level the vehicle. Do you think this will work?

I've never seen one but I have read that when you fit spacers you have to adjust/replace a bracket to realign whatever it is that tells the computer that your rear has sagged under load. So if you got hold of that sensor you could push/pull/move/wobble or whatever you need to do to it to depressurize the bags.

I wouldn't feel comfy playing about with the sensors from the point of view you might put the system into fault mode and if its anything like the rangies its a dealer reset. Maybe its different I dont know.

If you have the capability of lowering to bump stops then its not too bad - just pull the airline out of the collet at the valve block or the top of the airbag if you can get to it - just make sure you have sunnies on or protective eye gear as theres a bit of pressure. I have pulled lines of the rangie air springs many times and copped a face full of 45-60 PSI air for the 5 seconds it takes to deflate a bag the car has its weight on.

I would jack up the rear chassis and then put an axle stand under the axle just to keep it in place and pull the air lines out.

Don't know if it will fault the system when you put it back together - just make sure you dont start the car with it unplugged

disconnect the battery,jack up the rear of the car and support the body of the car and allow the axle to hang down a bit,next remove the cover from the compressor housing.
Towards the front of the compressor you will see a valve bank with three hoses going to it slowly undo the two outside ones until you hear air coming out most times a couple of turns should do it and give them a small wiggle at the same time.
Becareful and make sure the vehilce is fully supported you do not have to completely remove the bag just twist at tha bottom 90 degrees